Leak from 4.0 Autobox dipstick tube
#21
The following users liked this post:
Don B (03-10-2024)
The following users liked this post:
Don B (03-10-2024)
#23
Hi Vee,
Unfortunately, they all seem to be different. Even the XJ saloons with the same engine and gearbox have a completely different shaped tube.
I can't find the exact one on eBay etc. And with that annoying 90 degree join, where I seem to have the drip leak, I'm not sure I'd trust a used item.
I think I'm going to try and solder mine.
So, a word of warning to everyone when you next change your filter, be careful not to stress that 90-degree join in the dispstick tube!
Cheers
Paul
Unfortunately, they all seem to be different. Even the XJ saloons with the same engine and gearbox have a completely different shaped tube.
I can't find the exact one on eBay etc. And with that annoying 90 degree join, where I seem to have the drip leak, I'm not sure I'd trust a used item.
I think I'm going to try and solder mine.
So, a word of warning to everyone when you next change your filter, be careful not to stress that 90-degree join in the dispstick tube!
Cheers
Paul
The following 2 users liked this post by ptjs1:
Grant Francis (03-10-2024),
Greg in France (03-11-2024)
#24
Tonight, I decided I really had to get to the bottom of exactly where the leak was coming from.
After cleaning off the join at the bottom of the dipstick tube, I used a wirebrush wheel to remove the paint. I could then see that the 90 degree joint had originally been brazed. But even with a magnifying glass, I couldn't see a split in the brazing.
So I stared through the magnifying glass for 5 minutes and then, Eureka, I worked out where was the problem! There was surface corrosion near to the join and one tiny little pinprick had broken through the surface of the tube from which the tiniest smear of fluid slowly started to escape. I've highlighted it in the second photo.
It's almost unbelievable that a pinprick almost invisible to the naked eye, could cause this leak. It just goes to show how ATF can escape through the tiniest of imperfections.
So, tomorrow, I'll mask off, clean up the whole area more thoroughly, and then quickly smear the whole of that area with some Evostick epoxy metal putty which should seal it nicely, before painting it.
Hopefully that will be the end of a frustrating 2-year quest to stop a persistent drip!
Paul
After cleaning off the join at the bottom of the dipstick tube, I used a wirebrush wheel to remove the paint. I could then see that the 90 degree joint had originally been brazed. But even with a magnifying glass, I couldn't see a split in the brazing.
So I stared through the magnifying glass for 5 minutes and then, Eureka, I worked out where was the problem! There was surface corrosion near to the join and one tiny little pinprick had broken through the surface of the tube from which the tiniest smear of fluid slowly started to escape. I've highlighted it in the second photo.
It's almost unbelievable that a pinprick almost invisible to the naked eye, could cause this leak. It just goes to show how ATF can escape through the tiniest of imperfections.
So, tomorrow, I'll mask off, clean up the whole area more thoroughly, and then quickly smear the whole of that area with some Evostick epoxy metal putty which should seal it nicely, before painting it.
Hopefully that will be the end of a frustrating 2-year quest to stop a persistent drip!
Paul
The following users liked this post:
Mac Allan (03-11-2024)
#25
The following users liked this post:
ptjs1 (03-12-2024)
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